Table 1 Search strategy for the study.
| 1 epidemiologic studies/ |
| 2 exp case control studies/ |
| 3 exp cohort studies/ |
| 4 exp prospective studies/ |
| 5 exp “outcomes (health care)”/ |
| 6 exp outcome assessment/ |
| 7 exp prognosis/ |
| 8 exp risk factors/ |
| 9 exp Follow‐Up Studies/ |
| 10 exp Epidemiological Research/ |
| 11 odds ratio/ |
| 12 natural history.tw. |
| 13 time factors/ |
| 14 exp clinical trials/ |
| 15 recurrence/ |
| 16 incidence/ |
| 17 (case and control).tw. |
| 18 risk$.tw. |
| 19 etiol$.tw. |
| 20 aetiol$.tw. |
| 21 odds ratio$.tw. |
| 22 (causation or causal$).tw. |
| 23 cohort$.tw. |
| 24 (observational adj (study or studies)).tw. |
| 25 longitudinal.tw. |
| 26 prognos$.tw. |
| 27 outcome$.tw. |
| 28 predict$.tw. |
| 29 course$.tw. |
| 30 retrospective.tw. |
| 31 or/1–30 |
| 32 (talocrural or talo‐crural or talocalcaneal or talo‐calcaneal or talofibular or talo‐fibular).tw. |
| 33 inversion.tw. |
| 34 supination.tw. |
| 35 ankle$.tw. |
| 36 or/32–35 |
| 37 exp joint instability/ |
| 38 sprain$.tw. |
| 39 injur$.tw. |
| 40 exp “Sprains and Strains”/ and “strains”/ |
| 41 or/37–40 |
| 42 36 and 41 |
| 43 exp ankle injuries/ |
| 44 42 or 43 |
| 45 31 and 44 |
This strategy was used to search Medline. The strategy was modified for searches of other databases.